ST UK CONFERENCE 2006 1 1.0 INTRODUCTION Headphone modelling concerns the solution of a number of coupled problems centring on a small mechanical diaphragm vibrating in an enclosed space. Frequently, the electro-acoustic transduction mechanism is dynamic, and the transfer functions between electrical (v,i) and mechanical (F,u) quantities must be considered. These transfer functions will in part...

This work presents a framework for analysis of computational load centred on three components: i) the model of the system (the model), ii) the model of the mathematical/engineering problem (the problem) and iii) the numerical solution method(s) used for solving the combined model/problem formulation (the solver(s)). The framework classifies computational load as emerging from four mayor element...

An important problem one needs to deal with in a Voice over IP system is server overload. One way for preventing such problems is to rely on prediction techniques for the incoming traffic, namely as to proactively scale the available resources. Anticipating the computational load induced on processors by incoming requests can be used to optimize load distribution and resource allocation. In thi...

Accurate demand forecasts are important for managing energy efficiently in electric grids. However, building models for demand forecasting is a challenging task as it depends on numerous factors that are both intrinsic and external to the grid. Furthermore, these factors are time-varying and non-linear as well. This makes demand forecasting a cumbersome task. This investigation proposes a simpl...

Formulae are derived for the computation of the response of periodically supported structures subject to a moving or stationary harmonic load. They are expressed in terms of an integral over the wavenumber in the longitudinal direction. The structures may be described using either a multiple-beam model, or more generally, a two-and-half-dimensional finite-element model. The supports, described ...

Critical loads and their exceedances have been used in integrated assessment (IA) modelling since the negotiations leading to the Second Sulphur Protocol (Oslo, 1994). To be useable in IA models such as RAINS, the critical load information on the (currently) about 1.2 million ecosystems covering Europe has to be condensed and adapted. Since the deposition of sulphur and nitrogen species is comp...

We present a within-host model for tuberculosis (TB) infections, which directly models the bacterial load over the course of the infection. This allows for a future multi-scale model which can make use of the link between pathogen load and transmission potential of an infected host. By modelling the interactions between the host immune system, the invading bacteria and granulomas which are char...

Bonded joints used in wing sections and frames of aircraft structures are mostly exposed to cyclic loadings instead static ones during their services. Bending types dynamic encountered. In this study, the fatigue response a single lap joint (SLJ) bending loading was studied with developed advanced finite-element (FE) model. The cohesive zone model describing behaviour adhesive layer damage mech...

This paper is focused on variable amplitude loading spectra applied in the automotive industry, more specifically for chassis system parts with respect to high cycle fatigue design. A first analytical model referred as Heuler’s considered. It of simplest use, one parameter be identified. whole identification process, based road measurement realized carmaker’s proving ground instrumented vehicle...